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-rw-r--r--mm/rmap.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 2854857fd63b..9d2ba01bd4f9 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1582,6 +1582,8 @@ void hugepage_add_anon_rmap(struct page *page,
{
struct anon_vma *anon_vma = vma->anon_vma;
int first;
+
+ BUG_ON(!PageLocked(page));
BUG_ON(!anon_vma);
BUG_ON(address < vma->vm_start || address >= vma->vm_end);
first = atomic_inc_and_test(&page->_mapcount);

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